<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
</head>
<body>
  <input type="text" name="" value='青岛' class="inp1"><button class="btn1">查询城市1</button>
  <input type="text" name="" value='济南' class="inp2"><button class="btn2">查询城市2</button>

  <div id="main" style="width:100%;height: 400px;"></div>
  <script type="text/javascript" src="./echarts.js"></script>
  <script type="text/javascript" src="../13AJAX（尤其重要）/ajax.js"></script>
  <script type="text/javascript">
  	let inp1 = document.querySelector('.inp1')
  	let inp2 = document.querySelector('.inp2')
  	let btn1 = document.querySelector('.btn1')
  	let btn2 = document.querySelector('.btn2')
  	  let myChart = echarts.init(document.getElementById('main'));
    let option = {
      title: {
        text: '未来七天湿度对比图'
      },
      tooltip: {
        trigger: 'axis'
      },
      legend: {
        data: [inp1.value, inp2.value]
      },
      grid: {
        left: '3%',
        right: '4%',
        bottom: '3%',
        containLabel: true
      },
      toolbox: {
        feature: {
          saveAsImage: {}
        }
      },
      xAxis: {
        type: 'category',
        boundaryGap: false,
        data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
      },
      yAxis: {
        type: 'value'
      },
      series: [
        {
          name: inp1.value,
          type: 'line',
          stack: 'Total',
          data: [120, 132, 101, 134, 90, 230, 210]
        },
        {
          name: inp2.value,
          type: 'line',
          stack: 'Total',
          data: [220, 182, 191, 234, 290, 330, 310]
        }
      ]
    };
    myChart.setOption(option)
    btn1.onclick = function () {
        ajax({
            method: 'get',
            url: 'https://geoapi.qweather.com/v2/city/lookup',
            params: {
                location: inp1.value,
                key: 'c494e264764449f7b4f6bf742276d7f9'
            },
            success: function (res) {
                console.log(res)
                weather(res.location[0].id,1)
            }
        })
    }
    btn2.onclick = function () {
        ajax({
            method: 'get',
            url: 'https://geoapi.qweather.com/v2/city/lookup',
            params: {
                location: inp2.value,
                key: 'c494e264764449f7b4f6bf742276d7f9'
            },
            success: function (res) {
                console.log(res)
                weather(res.location[0].id,2)
            }
        })
    }

    function weather(id,cityIndex) {
        ajax({
            method: 'get',
            url: 'https://devapi.qweather.com/v7/weather/7d',
            params: {
                location: id,
                key: 'c494e264764449f7b4f6bf742276d7f9'
            },
            success: function (res) {
                console.log(res)
                if (res.code == 200) {
                    option.xAxis.data = []
                    if(cityIndex == 1){
                    	 option.series[0].data = []
                    	}else{
                    	 option.series[1].data = []

                    	}
                   

                    for (let i = 0; i < res.daily.length; i++) {
                        option.xAxis.data.push(res.daily[i].fxDate)
                        if(cityIndex == 1){
                        	 option.series[0].data.push(res.daily[i].humidity)
                        	 option.series[0].name = inp1.value
                        	 option.legend.data[0] = inp1.value

                        }else{
                        	 option.series[1].data.push(res.daily[i].humidity)
                        	 option.series[1].name = inp2.value
                        	 option.legend.data[1] = inp2.value
                        }
                       
                    }
                    // 重新渲染
                    myChart.setOption(option)
                }
            }
        })
    }
  </script>
</body>
</html>